De novo synthesis of functionalized 1,3-enynes and extended conjugated molecular systems
作者:Maddali L. N. Rao、Priyabrata Dasgupta、Venneti N. Murty
DOI:10.1039/c5ra01544h
日期:——
Pd-catalyzed coupling of 1,3-dienyldibromides with triarylbismuths was demonstrated for the synthesis of a diverse range of 1,3-enynes.
钯催化的1,3-二烯基二溴化物与三芳基双锑的偶联被证明可用于合成多种1,3-炔烃。
Synthesis of 2-Aryl-3-(arylselanyl)imidazo[1,2-a]pyridines: Copper-Catalyzed One-Pot, Two-Step Se-Arylation of Selenium with Imidazopyridines and Triarylbismuthanes
donors containing elements such as boron, silicon, tin, and iodine. A simple and general method for the synthesis of 2-aryl-3-(arylselanyl)imidazo[1,2-a]pyridines is described. A one-pot, two-step reaction between triarylbismuthanes and diimidazopyridyl diselenides, generated from imidazo[1,2-a]pyridines and Se powder in the presence of CuI and 1,10-phenanthroline, affords 3-selanylimidazopyridines in moderate
摘要 描述了一种简单且通用的合成2-芳基-3-(芳基硒基)咪唑并[1,2- a ]吡啶的方法。在CuI和1,10-菲咯啉的存在下,由咪唑并[1,2- a ]吡啶和Se粉末生成的三芳基双muthanes与二咪唑并吡啶基二硒化物之间的一锅两步反应,可提供中等收率至优异收率的3-selanylimidazopyridines。在有氧条件下。反应有效地进行,并且铋上的硒和所有芳基转移到偶联产物上。与其他含有硼,硅,锡和碘等元素的芳基供体相比,三芳基双muthanes可获得更好的结果。 描述了一种简单且通用的合成2-芳基-3-(芳基硒基)咪唑并[1,2- a ]吡啶的方法。在CuI和1,10-菲咯啉的存在下,由咪唑并[1,2- a ]吡啶和Se粉末生成的三芳基双muthanes与二咪唑并吡啶基二硒化物之间的一锅两步反应,可提供中等收率至优异收率的3-selanylimidazopyridines。在
Pd-Catalyzed Threefold Arylation of Baylis-Hillman Bromides and Acetates with Triarylbismuth Reagents
作者:Maddali L. N. Rao、Somnath Giri
DOI:10.1002/ejoc.201200543
日期:2012.8
alkyl 2-benzylacrylates and 2-benzylacrylonitriles were synthesized by means of atom-economic cross-couplings of Baylis–Hillmanbromides or acetates with BiAr3 under palladium-catalyzed conditions. These reactions, involving threefold aryl couplings using BiAr3 reagents with bromides and acetates, are fast and are completed in 1–2 h with high product yields.
Methyl diarylbismuthinates, a new class of organic pentavalent bismuth compounds, were prepared by the reaction of triarylbismuthines with chloramine-T in methanol and their chemical properties were investigated. These compounds possess a mild and selective oxidizing ability.
Synthesis of Highly Functionalized Triarylbismuthines by Functional Group Manipulation and Use in Palladium- and Copper-Catalyzed Arylation Reactions
作者:Martin Hébert、Pauline Petiot、Emeline Benoit、Julien Dansereau、Tabinda Ahmad、Adrien Le Roch、Xavier Ottenwaelder、Alexandre Gagnon
DOI:10.1021/acs.joc.6b00767
日期:2016.7.1
group tolerance. We report herein a detailed study on the preparation of highly functionalized triarylbismuth reagents by triple functional group manipulation and their use in palladium- and copper-catalyzed C-, N-, and O-arylation reactions.